Shiva Purana
गंधर्वाद्याः पिशाचांताश्चतस्रो देवयोनयः ॥ सिद्धा विद्याधराद्याश्च ये ऽपि चान्ये नभश्चराः ॥ १५६ ॥
The four demigods, headed by the Gandharvas, were born of the demigods. Siddhas Vidyadharas and others who fly in the sky.
english translation
gaMdharvAdyAH pizAcAMtAzcatasro devayonayaH ॥ siddhA vidyAdharAdyAzca ye 'pi cAnye nabhazcarAH ॥ 156 ॥
hk transliteration by Sanscript